Definition & Meaning of "catch feelings"in English

What does "to catch feelings" mean in slang?

The phrase "to catch feelings" uses "catch" in the sense of suddenly getting something, like catching a cold. This idea was extended to emotions, suggesting that feelings can develop unexpectedly or without full control. In modern slang, it means to begin developing romantic or emotional attachment to someone, often gradually and sometimes unintentionally, especially in casual or unplanned situations.